<?php

namespace app\api\controller;

use app\common\controller\Api;

/**
 * 支付接口
 */
class Wechat extends Api
{
    protected $noNeedLogin = ['money_notify','gold_coin_notify'];
    protected $noNeedRight = ['*'];
//接口API URL前缀
    const API_URL_PREFIX = 'https://api.mch.weixin.qq.com';
//下单地址URL
    const UNIFIEDORDER_URL = "/pay/unifiedorder";
//申请退款URL
    const RETURN_URL = "/secapi/pay/refund";
//公众账号ID
    private $appid;
//商户号
    private $mch_id;
//随机字符串
    private $nonce_str;
//签名
    private $sign;
//商品描述
    private $body;
//商户订单号
    private $out_trade_no;
//交易订单号
    private $transaction_id;
//支付总金额
    private $total_fee;
//终端IP
    private $spbill_create_ip;
//支付结果回调通知地址
    private $notify_url;
//交易类型
    private $trade_type;
//支付密钥
    private $key;
//证书路径
    private $SSLCERT_PATH;
    private $SSLKEY_PATH;
//所有参数
    private $params = array();
    private $test = array();

    public function _initialize()
    {
        $this->appid = 'wx030635056d1a0755';
        $this->mch_id = '1532065431';
        $this->key = 'aL9mOQ30713ppBZ6YiwRKipXTQv4gru9';
    }

    /**
     * 下单方法
     * @param $params array 下单参数
     * @return bool|mixed
     */
    public function unifiedOrder()
    {
        $params = input();
        $this->body = $params['name'];
//        $this->total_fee = $params['price'];
        $this->total_fee = 1;
        $this->out_trade_no = rand() . '_' . $this->uid;
        $type = input('type');
        if ($type == 1) {
            //充值余额回调地址
            $this->notify_url = config('href_url') . "/api/wechat/money_notify";
        } else {
            //充值金币回调地址
            $this->notify_url = config('href_url') . "/api/wechat/gold_coin_notify";
        }
        $this->trade_type = 'APP';
        $this->nonce_str = $this->genRandomString();
        $this->spbill_create_ip = $_SERVER['REMOTE_ADDR'];
        $this->params['appid'] = $this->appid;
        $this->params['mch_id'] = $this->mch_id;
        $this->params['nonce_str'] = $this->nonce_str;
        $this->params['body'] = $this->body;
        $this->params['out_trade_no'] = $this->out_trade_no;
        $this->params['total_fee'] = $this->total_fee;
        $this->params['spbill_create_ip'] = $this->spbill_create_ip;
        $this->params['notify_url'] = $this->notify_url;
        $this->params['trade_type'] = $this->trade_type;
        //获取签名数据
        $this->sign = $this->MakeSign($this->params);
        $this->params['sign'] = $this->sign;
        $xml = $this->data_to_xml($this->params);
        $response = $this->postXmlCurl($xml, self::API_URL_PREFIX . self::UNIFIEDORDER_URL);
        if (!$response) {
            $this->error('失败');
        }
        $result = $this->xml_to_data($response);
        if (!empty($result['result_code']) && !empty($result['err_code'])) {
            $result['err_msg'] = $this->error_code($result['err_code']);
        }
        if ($result['result_code'] == 'SUCCESS') {
            $result['timeStamp'] = time();
            $this->test['appid'] = $this->appid;
            $this->test['noncestr'] = $result['nonce_str'];
            $this->test['package'] = 'Sign=WXPay';
            $this->test['partnerid'] = $this->mch_id;
            $this->test['prepayid'] = $result['prepay_id'];
            $this->test['timestamp'] = $result['timeStamp'];
            $result['app_sign'] = $this->MakeSign($this->test);
        }
        $this->success('成功', $result);
    }

    /**
     *
     * 获取充值余额支付结果通知数据
     * return array
     */
    public function money_notify()
    {
        $data = $this->getData();
        if ($data['return_code'] == 'SUCCESS' && $data['result_code'] == 'SUCCESS') {
            //商户订单号
            $order_id = $data['out_trade_no'];
            //查看是否存在该未支付订单，下面可以根据自己业务逻辑编写
            $order = explode('_', $order_id);
            foreach ($order as $v) {
                $result = model('user')->where(['id' => $order[1]])->find();//获取用户信息
                //存在该用户并支付成功，进行修改
                if ($result) {
                    $result->money += $data['total_fee'] / 100;//修改余额
                    $result->save();
                    echo '<xml>
                              <return_code><![CDATA[SUCCESS]]></return_code>
                              <return_msg><![CDATA[OK]]></return_msg>
                          </xml>';
                    exit();
                }
            }
        }
    }

    /**
     *
     * 获取充值金币支付结果通知数据
     * return array
     */
    public function gold_coin_notify()
    {
        $data = $this->getData();
        if ($data['return_code'] == 'SUCCESS' && $data['result_code'] == 'SUCCESS') {
            //商户订单号
            $order_id = $data['out_trade_no'];
            //查看是否存在该未支付订单，下面可以根据自己业务逻辑编写
            $order = explode('_', $order_id);
            foreach ($order as $v) {
                //查找用户
                $result = model('user')->where(['id' => $order[1]])->find();
                //存在该订单并支付成功，进行修改
                if ($result) {
                    $exchange = db('configuration')->value('exchange');//获取兑换比例
                    $result->gold_coin += $data['total_fee'] / 100 * (float)$exchange;//修改金币余额
                    $result->save();
                    echo '<xml>
                              <return_code><![CDATA[SUCCESS]]></return_code>
                              <return_msg><![CDATA[OK]]></return_msg>
                          </xml>';
                    exit();
                }
            }
        }
    }

    /**
     * 获取通知数据
     * @return mixed
     */
    public function getData()
    {
        //获取通知的数据
        $testxml = file_get_contents("php://input");
        $jsonxml = json_encode(simplexml_load_string($testxml, 'SimpleXMLElement', LIBXML_NOCDATA));
        return json_decode($jsonxml, true);//转成数组，
    }

    /**
     * 订单退款
     */
    public function orderReturn()
    {
        $this->total_fee = (float)input('price') * 100;
        $this->transaction_id = input('alipay_trade_no');
        $order = \app\api\model\Order::get(['alipay_trade_no' => $this->transaction_id]);
        $this->nonce_str = $this->genRandomString();
        $this->params['appid'] = $this->appid;
        $this->params['mch_id'] = $this->mch_id;
        $this->params['nonce_str'] = $this->nonce_str;
        $this->params['transaction_id'] = $this->transaction_id;
        $this->params['out_refund_no'] = randNumber();
//        $this->params['total_fee'] = (float)$order['total']*100;
        $this->params['total_fee'] = $this->total_fee;
        $this->params['refund_fee'] = $this->total_fee;
        //获取签名数据
        $this->sign = $this->MakeSign($this->params);
        $this->params['sign'] = $this->sign;
        $xml = $this->data_to_xml($this->params);
        $response = $this->postXmlCurl($xml, self::API_URL_PREFIX . self::RETURN_URL, true);
        if (!$response) {
            $this->error('退款失败');
        }
        $result = $this->xml_to_data($response);
        if ($result['result_code'] == 'SUCCESS' && $result['return_code'] == 'SUCCESS') {
            $order->status = 3;
            $order->save();
            $this->success('退款成功');
        }
        $this->error('退款失败');
    }

    /**
     * 接收通知成功后应答输出XML数据
     * @param string $xml
     */
    public function replyNotify()
    {
        $data['return_code'] = 'SUCCESS';
        $data['return_msg'] = 'OK';
        $xml = $this->data_to_xml($data);
        echo $xml;
        die();
    }

    /**
     * 生成APP端支付参数
     * @param $prepayid 预支付id
     */
    public function getAppPayParams($prepayid)
    {
        $data['appid'] = $this->appid;
        $data['partnerid'] = $this->mch_id;
        $data['prepayid'] = $prepayid;
        $data['package'] = 'Sign=WXPay';
        $data['noncestr'] = $this->genRandomString();
        $data['timestamp'] = time();
        $data['sign'] = $this->MakeSign($data);
        return $data;
    }

    /**
     * 生成签名
     * @return 签名
     */
    public function MakeSign($params)
    {
//签名步骤一：按字典序排序数组参数
        ksort($params);
        $string = $this->ToUrlParams($params);
//签名步骤二：在string后加入KEY
        $string = $string . "&key=" . $this->key;
//签名步骤三：MD5加密
        $string = md5($string);
//签名步骤四：所有字符转为大写
        $result = strtoupper($string);
        return $result;
    }

    /**
     * 将参数拼接为url: key=value&key=value
     * @param $params
     * @return string
     */
    public function ToUrlParams($params)
    {
        $string = '';
        if (!empty($params)) {
            $array = array();
            foreach ($params as $key => $value) {
                $array[] = $key . '=' . $value;
            }
            $string = implode("&", $array);
        }
        return $string;
    }

    /**
     * 输出xml字符
     * @param $params 参数名称
     * return string 返回组装的xml
     **/
    public function data_to_xml($params)
    {
        if (!is_array($params) || count($params) <= 0) {
            return false;
        }
        $xml = "<xml>";
        foreach ($params as $key => $val) {
            if (is_numeric($val)) {
                $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
            } else {
                $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
            }
        }
        $xml .= "</xml>";
        return $xml;
    }

    /**
     * 将xml转为array
     * @param string $xml
     * return array
     */
    public function xml_to_data($xml)
    {
        if (!$xml) {
            return false;
        }
//将XML转为array
//禁止引用外部xml实体
        libxml_disable_entity_loader(true);
        $data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
        return $data;
    }

    /**
     * 获取毫秒级别的时间戳
     */
    private static function getMillisecond()
    {
//获取毫秒的时间戳
        $time = explode(" ", microtime());
        $time = $time[1] . ($time[0] * 1000);
        $time2 = explode(".", $time);
        $time = $time2[0];
        return $time;
    }

    /**
     * 产生一个指定长度的随机字符串,并返回给用户
     * @param type $len 产生字符串的长度
     * @return string 随机字符串
     */
    private function genRandomString($len = 32)
    {
        $chars = array(
            "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k",
            "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v",
            "w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G",
            "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R",
            "S", "T", "U", "V", "W", "X", "Y", "Z", "0", "1", "2",
            "3", "4", "5", "6", "7", "8", "9"
        );
        $charsLen = count($chars) - 1;
// 将数组打乱
        shuffle($chars);
        $output = "";
        for ($i = 0; $i < $len; $i++) {
            $output .= $chars[mt_rand(0, $charsLen)];
        }
        return $output;
    }

    /**
     * 以post方式提交xml到对应的接口url
     *
     * @param string $xml 需要post的xml数据
     * @param string $url url
     * @param bool $useCert 是否需要证书，默认不需要
     * @param int $second url执行超时时间，默认30s
     * @throws WxPayException
     */
    private function postXmlCurl($xml, $url, $useCert = false, $second = 30)
    {
        $ch = curl_init();
//设置超时
        curl_setopt($ch, CURLOPT_TIMEOUT, $second);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
//设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
//要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        if ($useCert == true) {
//设置证书
//使用证书：cert 与 key 分别属于两个.pem文件
            curl_setopt($ch, CURLOPT_SSLCERTTYPE, 'PEM');
            curl_setopt($ch, CURLOPT_SSLCERT, config('api_cert'));
            curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM');
            curl_setopt($ch, CURLOPT_SSLKEY, config('api_key'));
        }
//post提交方式
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
//运行curl
        $data = curl_exec($ch);
//返回结果
        if ($data) {
            curl_close($ch);
            return $data;
        } else {
            $error = curl_errno($ch);
            curl_close($ch);
            return false;
        }
    }

    /**
     * 错误代码
     * @param $code 服务器输出的错误代码
     * return string
     */
    public function error_code($code)
    {
        $errList = array(
            'NOAUTH' => '商户未开通此接口权限',
            'NOTENOUGH' => '用户帐号余额不足',
            'ORDERNOTEXIST' => '订单号不存在',
            'ORDERPAID' => '商户订单已支付，无需重复操作',
            'ORDERCLOSED' => '当前订单已关闭，无法支付',
            'SYSTEMERROR' => '系统错误!系统超时',
            'APPID_NOT_EXIST' => '参数中缺少APPID',
            'MCHID_NOT_EXIST' => '参数中缺少MCHID',
            'APPID_MCHID_NOT_MATCH' => 'appid和mch_id不匹配',
            'LACK_PARAMS' => '缺少必要的请求参数',
            'OUT_TRADE_NO_USED' => '同一笔交易不能多次提交',
            'SIGNERROR' => '参数签名结果不正确',
            'XML_FORMAT_ERROR' => 'XML格式错误',
            'REQUIRE_POST_METHOD' => '未使用post传递参数 ',
            'POST_DATA_EMPTY' => 'post数据不能为空',
            'NOT_UTF8' => '未使用指定编码格式',
        );
        if (array_key_exists($code, $errList)) {
            return $errList[$code];
        }
    }
}